Focusing device for lamps.



W. M. MATTEOLL FOCUSING DEVICE FOR LAMPS.

APPLICATION FILED FEB. 3. 1911-.

1,244,880. Patented Oct. 30, 1917.

" specification and 12L244, so.

To all whom it c tmcerm.

.ve'nted a new and useful "Focusing Devices for Lamps, of Which the following is a specification.

degree of variation "tofore, either are ture or do not economize in the space occu- 111g deviceem Be it known that I WILLIAM M. MATTEOLI, a citizen of the United States of America, and resident of Covington, inthe county of Kenton and State of Kentucky. have in- Improvement in Because of the great of the position of the filaments relatively to the center of electricbulbs, it has been found necessary to provide means for positioning the-filaments properly with relation to the focal center of the parabolic reflectors usually employed in automobile lamps.

have been provided here- Su'ch devices as too expensive to manufacpied by them.

An object of my' in 'ention is to produce a focusing device for automobile" lamps,

whichwill occupy less space and'which will be cheaperto manufacture than other focusin devices known to me. glhis and other objects are attainedin the focusing device described in the following illustrated in the accompanying drawings, in which:

Figure 1 is" a fragmental vertical section of a-lamp bod and reflector having a focusodying my invention, mounted therein.

Fig. 2 is a fragmental horizontal section of a lamp having a focusingdevice embodyin my invention, located therein.

A ig. 3 is a fragn'iental front elevation of my improved focusing device in position" in a 1 reflector shown ffra'gmentally, the a lamp bulhbeing removed.

improved fochsing'device consists of a shelld'adapted to contain the lamp bulb 5,

a sleeve6l'surrounding the shell, a ratchet shell and the sleeve 7 for retaining-the sleeve in adjusted positions; "a device Bier adjusting the sleeve andunechainsm 9 operatively connecting the for transforming rotatory motion of the sleeve-into reciprocatory opposite to one another, are additionalj sltit's motion of-the shell. "Shell l is of the usual construction, beingjthebody of the usual connector provided-for the shank 10 ofthe bulb5." This shell isslotted in the usual manner at diametrically opposite points 11 and: 12Jto receive .thebulb securing p ns 13 pro'yided on thef shank 10 of. the bulb. At

righh angles to theseslots and diametrically Specification or Letters laitent.

18 of the lamp and 14 and 15, these slots being'providedto receive reflector lugs 16, and 17 respectively, which form keys uponwhich the shell 4 may reciprocate, but which "prevent r0tation of the shell. Located between the'b'ody 18 and reflector 19 of 6 which surrounds the shell 4. and upon which it may be rotated. This sleeve is provided with one 0r more slots 20 which are formed spirally thereon and which cooperate with pins or screws 21 secured to the shell 1. By rotating the sleeve upon the shell. the pins 21 cooperating with the slots 20, cause the shell to reciprocate backwardly or forwardly to focus the filament 22 of the bulb 5, properly with relation to the focal center of the reflector 19. In order to permit rotatory movement of the sleeve and to avoid injuring the wire 23 through which current is delivered to the lamp bulb 5, I have provided an enlarged spiral slot 21 which permits of the'sleeves being rotated without comin'g'into contact withthe wire. At its end adjacent tothe body-18 of the lamp, the shell is provided with a knurled member 25 which is secured to a pin 2610* tat-ively mounted in the body portion. Located between knurled member 25 and body secured thereto is a spring 27 hav ng its end looped and bent into en agement with the knurled surface of member This construction permits of the sleeve being rotated in either direcat its outer end a knurled thumb nut or handleQSfby means of which pin 26 may be rotated. By this construction the sleeve is held against forward or backward move the lamp, is the'sl'eeve ment, but is permitted to be rotated, thus I acting to project or retract the shell w th' relation to the reflector 19. the shell having reciprocatory movement only because of its connection with the lugs 16. and 17 of the reflector. If desired. the knurled thumb nut- 28 mav be eliminated. pin 26, alone being properly, the

29 to receive to elfectits.

employed to focus the lamp pin being provided with a slot the blade of the screw driver rotation.

tion to the shell pf;.u1e;1amp connector means of which it communicatesreciproca;

my improved construction itlwill be J8 and the reflector 19 of the lamp, than would be required ordinarily by the connector in which the lamp bulb 5 is mounted. Such a construction is highly desirable in that the body 18 may be comparatively shallow as compared to the bodies of'lamps employing other focusing devices. This not only cheapm the construction of the lamp by 'eliniimiting a certain amount of material necessary to produce the deeper body, but it also eliminates certain manufacturing operations necessary to produce bodies of ex treme depth.

Having thus I claim is:

1. A focusing device for lamps having a body and a reflector mounted therein, consisting of a lamp connector reciprocally mounted in the reflector of the lamp, a sleeve located between the body and reflector of the lamp, rotatively mounted upon the connector and having means for recipdescribed my invention, what rocating the connector'when the sleeve is rotated.

2. A focusing device for lamps having a body and a reflector mounted therein, consisting of a. lamp connector reciprocally mounted in the reflector of the lamp, a sleeve located between the body and reflector of the lamp, rotatively mounted on the con-.

nector and having means for reciprocating the connector when the sleeve is rotated, and

means located exteriorly of the body, adapted to rotate the sleeve. v

3. A focusing device for lamps having a body and a reflector mounted therein, con sisting of a lamp connector reciprocally mounted in the reflector of the lamp, a pin mounted on the connector, and a sleeve located' between the body and reflector of the lamp, rotatively mounted on the connector and having a spiral slot for cooperation with .thepin forreciprocat-ing the connector when the sleeve is rotated.

4. A focusing device for lamps having a body and a reflector mounted therein, consisting of'a lamp connector reciprocally mounted in thei'freflector of the lamp, a pin mounted on the connector, a sleeve located between the body and reflector of the lamp,

rotatively mounted on the connector and having a spiral slot for cooperation with the in, and means located exteriorly of the ody adapted to rotate the sleeve.

5. A focusing device for lamps having a body and a reflector mounted therein, con sisting of a lamp connector reciprocally mounted in the reflector of the lamp, a sleeve located between the body and reflector of the lamp, rotatively -mounted on the connector and having means for reciprocating the connector when the sleeve is rotated, and means located exteriorly of the body, adapt- .ed to rotate the sleeve, said last mentioned means consisting of a pin extending through.

the body of-the lamp and accessiblefor rotation cxteriorly of the lamp.

6. A focusing device for lamps having a body and a reflector mounted. therein, consisting of a lamp connector reciprocally mounted in the reflector of a lamp, a pin mounted on the connector, a sleeve located between the body and reflector of the lamp, rotatively mounted on the connector and having a spiral slot for cooperation with the pin for reciprocating the connector when the sleeve is rotated, and means located exteriorly of the body, adapted to rotate the sleeve and consisting of apin extending through the body of the lamp, connected with the sleeve, and accessible for rotation exterior-1y of the lamp.

7 A focusing device for lamps'having a body and a reflector mounted therein, c011- sisting of a lamp connector reciprocally mounted in the reflector of a lamp, a pin mounted on the connector, a sleeve located between the body and reflector of the lamp, rotatively mounted on the connector and having a'spiral slot for cooperation with a pin mounted on theconnector, and a ratchet attached to the sleeve, adapted to retain the sleeve in adjusted positions.

8. A focusing device for lamps having a body and a reflector mounted therein, consisting of a lamp connector reciprocally mounted in the reflector of the lamp, a pin mounted on the connector, a sleeve located between the body and the reflector of the and having a spiral slot for cooperation with the'pin of the connector for reciprocating the connector when the sleeve is rotated, a ratchet attached to the sleeve, and a spring attached to the lamp for cooperation with said ratchet, adapted to retain the sleeve in adjusted positions.

10. A focusing device for lamps having a body and a reflector mounted therein, consisting of a lamp connector reciprocally mounted in the reflector of the lamp, a pin mounted on the connector, a sleeve located between the body and reflector of the lamp rotatively mounted on the connector an having a spiral slot formed therein for cooperation with the pin of the connector, a

ratchet attached to the sleeve, a spring at tached to the lamp for cooperation with A the ratchet, adapted to retain the sleeve in adjusted positions, and means loeaimi exteriorly of the body, adapted to rotate the 11. In combination, a lamp reflector and a. focusing device for lamps mounted .n ein, consisting of a lamp connector htl'iiljig a longitudinally extending slot formed 5 sleeve.

. therein, and :1 lug formed on the reflector adapted to cooperate with'the slot to permit reciprocation of the connector.

12. 'In combination, a lamp body, a lamp reflector mounted therein, axing formed on rotatively' mountsubscribed my name this 26th day of January, 1917.

WILLIAM M. MATTEOLI. 'Witness: i

W. THORNTON BOGERT. 

